<html>
    <head>
        <title>Itowns - Globe travel</title>

        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">

        <link rel="stylesheet" type="text/css" href="css/example.css">
        <link rel="stylesheet" type="text/css" href="css/LoadingScreen.css">

        <script src="https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.7.6/dat.gui.min.js"></script>
    </head>
    <body>
        <div id="viewerDiv"></div>

        <!-- Import iTowns source code -->
        <script src="../dist/itowns.js"></script>
        <script src="js/GUI/LoadingScreen.js"></script>


        <script type="text/javascript">



            // ---------- CREATE A GlobeView FOR SUPPORTING DATA VISUALIZATION : ----------

            // Define camera initial position
            const placement = {
                coord: new itowns.Coordinates('EPSG:4326', 2.351323, 48.856712),
                range: 25000000,
            }

            // `viewerDiv` will contain iTowns' rendering area (`<canvas>`)
            const viewerDiv = document.getElementById('viewerDiv');

            // Create a GlobeView
            const view = new itowns.GlobeView(viewerDiv, placement);

            // Setup loading screen and debug menu
            setupLoadingScreen(viewerDiv, view);

            // Display a realistic atmosphere
            view.getLayerById('atmosphere').setRealisticOn(true);


            // ---------- DISPLAY ORTHO-IMAGES : ----------

            // Add one imagery layer to the scene. This layer's properties are defined in a json file, but it could be
            // defined as a plain js object. See `Layer` documentation for more info.
            itowns.Fetcher.json('./layers/JSONLayers/Ortho.json').then(function _(config) {
                config.source = new itowns.WMTSSource(config.source);
                view.addLayer(
                    new itowns.ColorLayer('Ortho', config),
                );
            });



            // ---------- DISPLAY A DIGITAL ELEVATION MODEL : ----------

            // Add two elevation layers, each with a different level of detail. Here again, each layer's properties are
            // defined in a json file.
            function addElevationLayerFromConfig(config) {
                config.source = new itowns.WMTSSource(config.source);
                view.addLayer(
                    new itowns.ElevationLayer(config.id, config),
                );
            }
            itowns.Fetcher.json('./layers/JSONLayers/WORLD_DTM.json').then(addElevationLayerFromConfig);
            itowns.Fetcher.json('./layers/JSONLayers/IGN_MNT_HIGHRES.json').then(addElevationLayerFromConfig);



            // ---------- ANIMATE CAMERA : ----------

            const time = 50000;

            // Array containing CameraTransformOptions (see
            // http://www.itowns-project.org/itowns/docs/#api/Controls/CameraUtils) for each step of the animation.
            const pathTravel = [];
            pathTravel.push({ coord: new itowns.Coordinates('EPSG:4326', 2.0889, 42.809), range: 100000, time: time * 0.2 });
            pathTravel.push({ range: 13932, time: time * 0.2, tilt: 7.59, heading: 110.9 });
            pathTravel.push({ tilt: 8, time: time * 0.2 });
            pathTravel.push({ range: 70000, time: time * 0.2, tilt: 5, heading: 90 });
            pathTravel.push({ coord: new itowns.Coordinates('EPSG:4326', 7.0193, 43.991), tilt: 11.5, heading: 127.211, time: time });
            pathTravel.push({ range: 10414, time: time * 0.2 });
            pathTravel.push({ tilt: 8, time: time * 0.2 });
            pathTravel.push({ range: 60000, heading: -40, time: time * 0.2 });
            pathTravel.push({ coord: new itowns.Coordinates('EPSG:4326', 9.114, 41.973), tilt: 15.92, heading: 13.18, time: time });
            pathTravel.push({ range: 16601, time: time * 0.2 });

            function travel() {
                return itowns.CameraUtils
                    .sequenceAnimationsToLookAtTarget(view, view.camera.camera3D, pathTravel);
            }


            // Listen for globe full initialisation event
            view.addEventListener(itowns.GLOBE_VIEW_EVENTS.GLOBE_INITIALIZED, function init() {
                // eslint-disable-next-line no-console
                console.info('Globe initialized');
                travel().then(travel).catch(console.error);
            });
</script>
</body>
</html>
